Final answer:
The symptoms presented are indicative of endometriosis, a condition where endometrial tissue grows outside the uterus, causing pain, heavy menstrual flow, and potentially infertility.
Step-by-step explanation:
The symptoms of pain, dysmenorrhea, heavy prolonged menstrual flow, and tender nodules along the uterosacral ligament suggest the diagnosis of endometriosis. Endometriosis is a disease where endometrial tissue grows outside the uterus, often causing inflammation, pain, and scarring. It can lead to symptoms like chronic pelvic pain, especially during menstruation, and may also result in infertility due to scar formation or anatomical distortions.